generated: '2026-10-10'
method: probed
source: pre-flight dossier (docs platform, portal detections) + CNAME chains and response headers of the hosts apis.yml names
registry: all/0-working/vendors.yml
areas_vocabulary:
- documentation
- developer-portal
- api-gateway
- cdn
- hosting
- sdk-generation
- api-collections
- status-page
- support
- community
- identity
- mcp-hosting
vendors:
- vendor: cloudflare
  name: Cloudflare
  area: cdn
  host: developer.gitbook.com
  evidence: header:cf-ray
  signal: header
  confidence: high
  kin_score:
  - https_enforced
  - hsts
- vendor: gitbook
  name: GitBook
  area: documentation
  host: developer.gitbook.com
  evidence: cname:gitbook.com
  signal: docs-platform
  confidence: high
  kin_score:
  - openapi_published
  - llms_txt
- vendor: vercel
  name: Vercel
  area: hosting
  host: developer.gitbook.com
  evidence: header:x-vercel-id
  signal: header
  confidence: high
  kin_score: []
- vendor: incident-io
  name: incident.io
  area: status-page
  host: www.gitbookstatus.com
  evidence: cname:incident.io
  signal: cname
  confidence: high
  kin_score:
  - status_page
reliance:
  areas_vendor_served:
  - cdn
  - documentation
  - hosting
  - status-page
  vendor_count: 4
  areas_observed: 12
  share_of_observable_areas: 0.333
  note: areas where a third party was DETECTED serving this provider; an area absent here was either self-run or not observed, and this script
    cannot tell those apart
checked:
- 'docs-platform: gitbook'
- www.gitbook.com (Support)
- developer.gitbook.com (Documentation)
- www.gitbook.com (Website)
- app.gitbook.com (SignUp)
- gitbook.com (GettingStarted)
- www.gitbookstatus.com (StatusPage)
- gitbook.com (APIReference)
- mcp.gitbook.com (mcp)